Keep long agent sessions working - pinned facts, structured summary templates, offloading tool output, compaction thresholds and recall tests
Tune pgvector for fast, accurate search - cosine and L2 operator classes, HNSW vs IVFFlat, ef_search, filtered queries and recall measurement
Migrate to a new embedding model safely - versioned columns, dual-write, backfill, offline evaluation, shadow traffic, cutover and rollback
Design LLM provider fallback and routing - error classification, circuit breakers, equivalent models, request adapters and failover testing
Write tool error messages that let an AI agent recover - structured errors, retryable flag, field-level hints, safe messages and size limits
Fix Node.js fetch failed errors - read error.cause, ECONNRESET, UND_ERR_CONNECT_TIMEOUT, IPv6 and DNS, keep-alive resets, proxies and TLS
Make Python requests reliable - connect and read timeouts, Session with urllib3 Retry, safe POST retries, raise_for_status and SSL errors
Find and fix flaky pytest tests - random order, repeat and xdist reproduction, shared state, fixture scope, time, network and async races
Fix environment variables undefined in production - dotenv, build-time vs runtime, NEXT_PUBLIC and VITE prefixes, systemd, Docker Compose and serverless
Debug JWT validation failures - invalid signature, expired tokens and clock skew, aud and iss checks, JWKS key rotation and secure verifier rules
Design an API rate limiter - token bucket vs sliding window, identity keys, atomic Redis Lua, 429 with Retry-After, cost weighting and burst tests
Debug an EVM transaction that reverted - decode revert data, replay with eth_call, trace tools and common causes like allowance, slippage and deadline
Fix a stuck pending EVM transaction - find the blocked nonce, speed up or cancel with a same-nonce higher-fee replacement, and clear wallet nonce drift
Fix EIP-712 and EIP-3009 signature verification failures - domain name, version, chainId, type hash order, v/r/s format and EIP-1271 smart wallets
Fix Solana token account errors - create missing associated token accounts, rent-exempt minimums, Token vs Token-2022 and reading simulation logs
ERC-20 approvals explained - check allowances, set exact amounts, revoke unlimited approvals, understand Permit signatures and spot drainer requests
Fix viem and ethers RPC errors - rate limits and retries, fallback transports, eth_getLogs range limits, chain id checks and lagging nodes
A 20-minute smart contract red-flag checklist - verified source, proxy admin, owner powers, honeypot signs, oracles, liquidity locks and audit evidence
Build a safe x402 client - per-payment and daily caps, host and payee allowlists, identical-header retries after ambiguous settlement and payment receipts
Make your OpenAPI spec usable by AI agents - intent-based operationIds, parameter descriptions and examples, error responses, linting and an agent test
Make your site and API discoverable to AI agents - llms.txt, OpenAPI and MCP manifests, intent-first descriptions, sitemap and registry listings
Add authentication to a remote MCP server - API keys vs OAuth 2.1, audience and scope checks, per-tool authorization, Origin checks and audit logs
Test webhooks locally - Cloudflare Tunnel and ngrok, provider CLIs, request replay, raw-body signature checks and idempotent retry handling
Diagnose slow MySQL queries - slow log, EXPLAIN types and Extra flags, composite index order, covering indexes and index-killing patterns
